Please be sure to read the instructions and get familiar with this product before flying, otherwise there could be a serious accident. Aircraft crashed, rotating propeller may hurt people and objects. Aircraft may be out of control or even lost.

Please observe the LED flashing status.
Four yellow flashes means preheating, and after preheating it will be OK.
Four green flashes means sensor error, please connect to the assistant software and calibrate the IMU.
Four red flashes means the sticks are not in center position, please connect the software and calibrate the transmitter.

Please check the power supply connection.
Please check the transmitter stick commands and its channel mapping in the software, it has to be consistent and make full range sliding. And check the throttle and pitch channel mapping.

Please read the user manual carefully, this may be caused by incorrect installation. Please check:
1. the orientation of the main controller;
2. the rotate direction of the motor and propeller;
3. the ESCs are in the correct port;
4. set the correct mixer type in the software;